<?php
$a = file_get_contents('../../../a.css');
echo $a;
?>
<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title></title>
    <link rel="stylesheet" type="text/css" href="../../../../../a.css">
</head>
<body>
<h1>asdasfdfas</h1>
</body>
</html>